New Domino Silyl Enol Ether Reactions in the Synthesis of a Tetrodecamycin Fragment
作者:Jing He、Kirill Tchabanenko、Robert M. Adlington、Andrew R. Cowley、Jack E. Baldwin
DOI:10.1002/ejoc.200600346
日期:2006.9
the TMS enol ether 7 underwent a domino acid catalysed rearrangement, Diels–Alder cycloaddition and further rearrangement to give the bicyclic TMS enol ether 17, which was converted into a tetrodecamycin precursor 3 in three synthetic steps. Further, monocyclic silyl enol ethers were consecutively treated with mCPBA and bromine to give syn α-hydroxy α′-bromo ketones in a one-pot reaction sequence. (©
在 180 °C 的甲苯中加热四天后,TMS 烯醇醚 7 经历了多米诺酸催化的重排、Diels-Alder 环加成和进一步重排,得到双环 TMS 烯醇醚 17,在三个合成过程中将其转化为十四霉素前体 3脚步。此外,单环甲硅烷基烯醇醚连续用 mCPBA 和溴处理,以一锅反应顺序得到顺式 α-羟基 α'-溴酮。(© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2006)